Savorex is a brand name for a seasoning that may be available in the spice section of your grocery store or your local health-food store. Savorex is a dark brown, salty yeast-based paste similar to Vegemite, or Marmite. In the form of a dark brown food paste, it is used to flavor soups and vegetable dishes. The most popular way to eat Savorex to spread it on a slice of bread.